Shanghai Daoqin Plastics Co., Ltd.

PC toughening agent in plastics modified toughened in is very good product, that 么PC toughening agent processing process/workflow process is how 样 你们都知道吗? lower 面我们一起 detailed lower PC toughening agent process process/workflow has which 事项吧.

1, PC toughening agent plastics 处理:

PC water absorption relatively large, processing front need preheating drying, pure PC drying 120℃, modified PC generally use 110℃ temperature degree drying 4 small above. drying time can ultra- 10 small 时. generally can use for extrusion method drying is 否足够.

recycled material use ratio/proportion can 达20%. in certain lower, can 100% use recycled material, 实际份 amount need products quality requirements 而定. recycled material can meanwhile mixed combined different color masterbatch, 否则会严 heavy loss bad formed product property 质.

2, injection molding machine selection:

现 in PC products due to cost and its it causes, more use modified material, modified process in need use to PC specialized toughening agent and other plastics modified material. especially is electrical product, also must increase anti property can, in flame retardant PC and its it plastics alloy product molding 时, for injection molding machine system requirements is mixed combined good, corrosion resistant, 常规 塑化 screw difficult to, in 选购时, need 预先说明. 华美达 company has specialized PC screw 供客户 selection.

3, mold and gate design:

Common mold temperature degree is 80-100℃, add glass fiber (GF) is 100-130℃, small type products can use gate, gate deep degree has most thick 部位 70%, its it gate has ring and long 方形.

gate large good, decrease low plastics by degree 剪切而造 formed defect. gas deep degree small 于0.03-0.06mm, runner amount short 而圆. demolding degree generally is 30′-1 left right.

4, temperature degree:

can use for injection method processing temperature degree high low. generally PC processing temperature degree is 270-320℃, has modified or low molecular weight PC is 230-270℃.

5, injection speed degree:

more use fast injection speed degree molding, electrical appliances parts. Common is slow speed → fast speed molding.

6, back pressure:

10bar left right back pressure, in has gas marks and mixed color lower can reduce.

7, time:

in high temperature lower time long, material material drop 质, 放也CO2, formed color. use LDPE, POM, ABS or PA清理 machine 筒. application PS清理.

8, precautions:

PC toughening agent has modified PC, due to recycling 次数太 more （ molecular weight reduce ） or various formed separation mixing/compounding 不均, easy generate deep color liquid 体泡.